Safety messages
NOTICE
This guide provides basic guidelines for installing the Rosemount
™
644 Temperature Transmitter. It
does not provide instructions for detailed configuration, diagnostics, maintenance, service,
troubleshooting, or installation. Refer to the Rosemount 644 Reference Manual for more instruction.
The manual and this guide are also available electronically on Emerson.com/Rosemount.
Important
Read this manual before working with the product. For personal and system safety, and for optimum
product performance, make sure to thoroughly understand the contents before installing, using, or
maintaining this product. The United States has two toll-free assistance numbers and one international
number.
Customer Central: 1-800-999-9307 (7:00 a.m. to 7:00 p.m. Central Standard Time)
National Response Center: 1-800-654-7768 (24 hours a day). Equipment service needs
International: 1-(952)-906-8888
WARNING
Follow instructions
Failure to follow these installation guidelines could result in death or serious injury.
Ensure only qualified personnel perform the installation.
WARNING
Explosions
Explosions could result in death or serious injury.
Installation of the transmitters in a hazardous environment must be in accordance with the
appropriate local, national, and international standards, codes, and practices. Please review the
Product Certifications section for any restrictions associated with a safe installation.
Do not remove the connection head cover in explosive atmospheres when the circuit is live.
Before connecting a handheld communicator in an explosive atmosphere, ensure the instruments
are installed in accordance with intrinsically safe or non-incendive field wiring practices.Verify the
operating atmosphere of the transmitter is consistent with the appropriate hazardous locations
certifications.
All connection head covers must be fully engaged to meet explosion-proof requirements.
WARNING
Process leaks
Process leaks could result in death or serious injury.
Do not remove the thermowell while in operation.
Install and tighten thermowells and sensors before applying pressure.
Quick Start Guide April 2019
2 Rosemount 644H and 644R
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